This CURT bike rack support strap provides added stability and support for a hitch-mounted bike rack. The vinyl-coated hook prevents scratches on painted surfaces. It features a generous 61-inch length and is recommended for all hitch-mounted bike racks. Failure to use a support strap with a 1-1/4-inch bike rack will void the warranty of the trailer hitch and bike rack. It is required for all 1-1/4-inch hitch-mounted bike racks. WARNING: Remove hook before opening or closing hatch or trunk.